水下航行体尾喷燃气与通气超空泡相互作用的研究  

Study on the interaction between ventilated cavitating flow and exhausted gas of an underwater vehicle

作　　者：胡勇[1] 陈鑫[1] 鲁传敬[1] 潘展程[1] 郭建红[1] 

机构地区：[1]上海交通大学船舶海洋与建筑工程学院,上海200240

出　　处：《水动力学研究与进展（A辑）》2008年第4期438-445,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金项目(10372061)资助

摘　　要：基于Reynolds平均Navier-Stokes方程和Mixture多相流模型,耦合自然空化模型,采用有限体积法,建立了气、汽、液多相通气空泡流和燃气射流的数值模拟方法,模拟了超空泡航行体尾部燃气射流与通气空泡的相互作用,研究了通气量和燃烧室总压对它的影响。计算结果表明:燃气射流对于通气空泡流具有引射作用,使得空泡尺度特别是其后部明显收缩,空泡变短,"颈缩"位置前移,航行体阻力系数变大,导致泄气截面面积减小,并影响泡内的压力分布。Based on the RANS equations and mixture multiphase model, coupling with a natural cavitation model, a numerical method is established to solve the multiphase flow of gas, vapor and water around an underwater supercavitating vehicle by using the Finite Volume Method （FVM）. The interaction between ventilated cavitating flow and exhausted gas is simulated, especially the influence of ventilated rate and the total-pressure of the exhausted gas is analyzed. The results indicate that, the exhausted gas has entrainment effect and ejector effect on ventilated cavitating flow. These effects make the cavity shrinking especially at the tail, the neck moving forward, the drag coefficient increasing and the leakage area reduced, and impact the pressure distribution in the cavity.

关 键 词：水下航行体 通气超空泡 燃气射流 多相流 

分 类 号：O359[理学—流体力学] O427.4[理学—力学]